Isaac mat



(No Model.) f

. I. MAY & C. 8v T. SPIKINS ALoGKPoR SWITGHBS No. 400.580. l

Patented Apr.- 2, 1889.,

UNITED STATES PATENT OFFICE.

IsAAc MAY, on BROOKLYN, AND CHARLES sPIKINs AND THOMAS sPIKINs,

oF NEW YORK, N. Y.

LOCK FOR SWITCHES.

SPECIFICATION forming part of ALetters Patent No. 400,580, dated'April2, 1889.

Application iiled January 3, 1887. Serial No. 223,167. (No model.)

To all whom it may concern:

Be it known that We, ISAAC MAY, of Brooklyn, in the county of Kings andState of Newl Switches, of which the following is a specifi'- cation.

This invention relates to an improvement upon the devices set forth inour Patent, No. 355,545, granted January 4, 1887, and said improvementis for simplifying the bolt and the connections made use of for holdingthe switch in either of the positions -to which Ait may be moved. 4

In the drawings, Figure l is a plan view of the said improvement, andFig. 2 is a longi-V tudinal section in larger size through the bolt.

vThe track-rails A, switch-rails B, the slotted cam-platel K, theguide-anges Gfor the same, and the rod L, that connects the plate K Withthe switch-actuating lever, are the same as set forth in our aforesaidpatent, and the rod F connects the slotted cam-plate K with the cross orlocking bar C of the switch, so that said switch is moved by the slottedcam-plate, and the end portions of the slot in the cam-plate K areparallel, in order that the cam-plate may be moved endWise at thecommencement of the motion in either direction Without disturbing theswitch-rails, the diagonal portion of the slot in the cam-plate K givingthe motion to such switch-rails.

Instead of making use of two bolts, as in said patent, We employ but onebolt,l D, and the same is supported in a suitable stock, E, which stockhas side flanges, so that the shank of the bolt slides through mortisesin such vertical side iianges, and in the opposite faces of thesevertical sides thereare grooves for the reception of the vcam-slide M,and this cam-slide has a mortise through it for the reception of a pinupon the shank of the bolt. The middle portion of this slot in thecamplateM is parallel, or nearly so, With the edges, and the ends of theslot are inclined in opposite directions. A link, N, is connected withlthe end of this cam-plate M and extends to the bent lever O, pivoted onthe plateO, and the link P connects the other end of the lever O to thecam-slide K. It Will now be understood that when the plate K is moved bythe rod L the cam-slide M is also moved endwise, and that the cam-slotin the slide M WithdraWs the bolt D from one hole in the locking-bar Cbefore the diagonal portion of the cam-slot in the plate K commences tomove the switch-rails B, and after the switch-rails have been moved toposition the other end of the cam-slot in the slide M acts upon the boltD to project the same into the second hole in the locking-bar C duringthe latter portion of the movement of the cam-plate K, When the switchis not being moved, because the pin I is Within the parallel end portionof the slot in the cam-plate K. By these improvements the parts aresimplified and the locking-bolt is Withdrawn before the switch is moved,and it is projected after the said switchhhas been set into place. Theguardrail S, the short links T, and the connectinglink U are similar tothose in our aforesaid patent.

Ve claim as our invention- The combination, with the track-rail andswitch-rail, of the cam-plate K and bar F, for moving the switch-rail,and the stock E and bolt D, the shank of which slides through the stock,the cam-slide M, supported in the stock E and having a mort-isc withinclined ends to act upon the bolt, the -link N, lever O, and link P,for connecting the plate K to the camslide M, substantially as setforth.

Signed by us this 29th day of December, A. D. 1886.

ISAAC MAY. CHAS. SPIKINS. TI-IOS. SPIKINS.

Witnesses:

WILLIAM G. MOTT, WALLACE L. SERRELL.

